Hi I have recently bought a DLP NIR scan EVM. I am trying to test the device and have some problem measuring NIR using liquid samples. I first did the referencing by inserting nothing in the holder (not even cuvette) and reference measured. After that, I inserted plastic cuvette nothing contained and obtained the plot below
After that, I filled the cuvette with water and obtained the plot below, which has zero absorbance as shown below. Why It shows no data? Is this device's problem or am I missing something? I also tried referencing with empty cuvette and scanned with water-filled cuvette and it showed no data, which is same as the previous run. Can anyone please help me with this issue? Thank you.
Saved data.
| Method: | Line Scan | |||
| Host Date-Time: | 22/11/2017 @ 21:42:32 | |||
| Sample Name: | default_scan_1 | |||
| Spectral Range Start (nm): | 1350 | |||
| Spectral Range End (nm): | 2450 | |||
| Number of Wavelength Points: | 200 | |||
| Digital Resolution (nm): | 5.5 | |||
| Number of Scans to Average: | 1 | |||
| Total Measurement Time (ms): | 300 | |||
| PGA Gain: | 32 | |||
| Wavelength (nm) | Absorbance (AU) | Reference Signal (unitless) | Sample Signal (unitless) | |
| 1353.75 | -3.3062 | 1886390 | -4.8E+08 | |
| 1359.75 | -3.3522 | 1696788 | -4.8E+08 | |
| 1365.76 | -3.3011 | 1908539 | -4.8E+08 | |
| 1371.76 | -3.3441 | 1728795 | -4.8E+08 | |
| 1377.75 | -3.2943 | 1938802 | -4.8E+08 | |
| 1383.74 | -3.3433 | 1731926 | -4.8E+08 | |
